Fig. 5From: The Influence of Materials, Heterostructure, and Orientation for Nanohybrids on Photocatalytic ActivityThe top view SEM image of ZnO/NiO (1 min) heterojunction (a), ZnO/NiO (10 min) heterojunction (b), NiO (1 min)/ZnO heterojunction (c), NiO (10 min)/ZnO heterojunction (d), NiO (1 min) (e), and NiO (10 min) (f)Back to article page